Writes 8-byte little-endian representation of 64-bit unsigned value to byte array starting at offset.
Due to JavaScript limitation, supports values up to 2^53-1.
If byte array is not given, creates a new 8-byte one.
Returns the output byte array.
Writes 8-byte little-endian representation of 64-bit unsigned value to byte array starting at offset.
Due to JavaScript limitation, supports values up to 2^53-1.
If byte array is not given, creates a new 8-byte one.
Returns the output byte array.